JPH0365251B2 - - Google Patents
Info
- Publication number
- JPH0365251B2 JPH0365251B2 JP2478784A JP2478784A JPH0365251B2 JP H0365251 B2 JPH0365251 B2 JP H0365251B2 JP 2478784 A JP2478784 A JP 2478784A JP 2478784 A JP2478784 A JP 2478784A JP H0365251 B2 JPH0365251 B2 JP H0365251B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- wall layer
- hole
- mold
- porous plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920003023 plastic Polymers 0.000 claims description 23
- 239000004033 plastic Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000003811 curling process Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/10—Closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2024/00—Articles with hollow walls
- B29L2024/006—Articles with hollow walls multi-channelled
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】
（産業上利用の分野）
本発明は、管壁内に管軸方向の通孔を多数有す
るプラスチツク管（以下、「多孔プラスチツク管」
という）の管端面に開口した通孔を確実に閉塞で
きる方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a plastic tube (hereinafter referred to as a "porous plastic tube") having a large number of through holes in the tube wall in the tube axis direction.
This invention relates to a method for reliably closing a through hole opened in the end surface of a tube.
（従来技術）
この種多孔プラスチツク管は、管壁内に通孔が
存在することによつて、ブラスチツク材料の節
減、管重量の軽減が計れると共に、管壁の肉厚を
増すことによつて管の剛性を高めることができる
という利点がある。(Prior art) This type of porous plastic pipe has through holes in the pipe wall, which saves plastic material and reduces the weight of the pipe, and also increases the thickness of the pipe wall. It has the advantage of increasing the rigidity of the
このため、多孔プラスチツク管は、地中埋設用
配管として用いられている。 For this reason, porous plastic pipes are used as underground pipes.
ところで、この多孔プラスチツク管同士の接続
は、従来の孔の無い管同士の接続の場合と同様
に、一方の管の端部を拡径して受口を設け、該受
口に他方の管の端部を挿入して接続しているが、
多孔プラスチツク管では管壁内の通孔を介して管
の内側と外側とが連通してしまうため、管内流体
が漏洩したり、雨水等の地下水が管内に流入する
ことがある。 By the way, the connection between these porous plastic tubes is similar to the conventional connection between tubes without holes.The end of one tube is enlarged in diameter to provide a socket, and the other tube is connected to the socket. I inserted the end and connected it, but
In porous plastic pipes, the inside and outside of the pipe communicate through holes in the pipe wall, so fluid within the pipe may leak or groundwater such as rainwater may flow into the pipe.
そこで、この問題を解決するために、従来は多
孔プラスチツク管の端部を加熱軟化した後、この
管端部を押潰して通孔を閉塞していたが、通孔閉
塞が完全でなかつた。 In order to solve this problem, conventional methods have been to soften the end of a porous plastic tube by heating and then crush the end of the tube to close the hole, but the hole was not completely closed.
即ち、管壁を押潰し、内壁層と外壁層とを密着
させて通孔を閉塞しただけでは、この閉塞部に振
動、衝撃等が作用した際に、内壁層と外壁層とが
剥離して管内流体が漏洩することがあつた。 In other words, if the pipe wall is crushed and the inner wall layer and outer wall layer are brought into close contact with each other to close the hole, the inner wall layer and the outer wall layer will separate when vibrations, shocks, etc. are applied to the blocked part. Fluid inside the pipe occasionally leaked.
（発明の目的）
本発明は、上記従来閉塞方法の問題点を解決し
たものであつて、通孔閉塞が確実に行なえると共
に、振動、衝撃等が作用した際にも管内流体が漏
洩することのない通孔閉塞法を提供するものであ
る。(Purpose of the Invention) The present invention solves the problems of the conventional closing method described above, and is capable of reliably closing the through hole and preventing fluid in the pipe from leaking even when subjected to vibrations, shocks, etc. The present invention provides a method for occluding the hole without the need for
（発明の構成）
以下、本発明の具体的構成を図面にて説明す
る。(Structure of the Invention) Hereinafter, a specific structure of the present invention will be explained with reference to the drawings.
第１図は多孔プラスチツク管の部分正面図、第
２図は本発明の押潰工程を示す要部半断面図、第
３図は反転カールの工程を示す要部半断面図、第
４図は本発明によつて得られた閉塞端部の要部半
断面図、第５図は押潰工程の他の実施例を示す要
部半断面図であつて、図中符号１は多孔プラスチ
ツク管、２は押潰金型、３は反転金型、４は外
型、５は内型である。 Figure 1 is a partial front view of a porous plastic tube, Figure 2 is a half-sectional view of the main part showing the crushing process of the present invention, Figure 3 is a half-sectional view of the main part showing the inversion curling process, and Figure 4 is a half-sectional view of the main part showing the inversion curling process. FIG. 5 is a half-sectional view of the main part of the closed end obtained by the present invention, and FIG. 2 is a crushing die, 3 is an inversion die, 4 is an outer die, and 5 is an inner die.
多孔プラスチツク管１は、塩化ビニル樹脂、ポ
リエチレン樹脂等のプラスチツク素材からなり、
断面円形、卵形その他適宜形状を有するプラスチ
ツク管１は、第１図に示す如く、内壁層１１と外
壁層１２とが隔壁１４で連結し、管軸方向に連通
した通孔１３が多数設けられた構成からなつてい
る。 The porous plastic pipe 1 is made of a plastic material such as vinyl chloride resin or polyethylene resin.
As shown in FIG. 1, a plastic tube 1 having a circular, oval, or other appropriate shape in cross section has an inner wall layer 11 and an outer wall layer 12 connected by a partition wall 14, and a large number of through holes 13 communicating in the tube axis direction. It is made up of several structures.
本発明の閉塞方法は、まず第２図に示す如く、
この多孔プラスチツク管１の端部を加熱し、軟
化、若しくは溶融して、該管端部を押潰金型２内
で押潰す。 The occlusion method of the present invention first includes, as shown in FIG.
The end of this porous plastic tube 1 is heated to soften or melt, and the tube end is crushed in a crushing mold 2.
押潰金型２は、多孔プラスチツク管１の端部が
挿入される環状溝２１を有し、該環状溝２１の奥
には内周側から外周側に傾斜した面２２が設けら
れている。この傾斜面２２は、テフロン樹脂等で
コーテイングされており、その近傍には加熱ヒー
タ２３が埋設されている。従つて、管１の端部が
環状溝２１内に挿入されると、軟化、若しくは溶
融し、その内壁層１１の端部が傾斜面２２に乗り
上げられて押潰され、外壁層１２と密着する。
尚、この押潰工程では、予めプラスチツク管の端
部を加熱軟化させておき、この管端部を押潰金型
３内に押込むようにするとよい。 The crushing mold 2 has an annular groove 21 into which the end of the porous plastic tube 1 is inserted, and at the back of the annular groove 21 is provided a surface 22 that slopes from the inner circumferential side to the outer circumferential side. This inclined surface 22 is coated with Teflon resin or the like, and a heater 23 is buried near it. Therefore, when the end of the tube 1 is inserted into the annular groove 21, it softens or melts, and the end of the inner wall layer 11 rides on the slope 22 and is crushed, coming into close contact with the outer wall layer 12. .
In this crushing step, it is preferable to heat and soften the end of the plastic tube in advance, and then push this tube end into the crushing mold 3.
次いで、第３図に示す如く、この押潰された管
端部を反転金型３内に押込み、その先端肉薄部を
反転カールさせる。 Next, as shown in FIG. 3, this crushed tube end is pushed into an inversion mold 3, and the thin end portion thereof is inverted and curled.
反転金型３は、管１の端部が挿入される環状溝
３１の奥に円弧面３２が形成されており、管端部
が挿入されるとその先端肉薄部が円弧面３２に当
接して反転カールする。 The reversing mold 3 has an arcuate surface 32 formed at the back of the annular groove 31 into which the end of the tube 1 is inserted, and when the tube end is inserted, the thin end portion thereof comes into contact with the arcuate surface 32. Invert curl.
尚、この反転工程では、反転カールさせる先端
肉薄部を更に加熱し、溶融状態にしてから反転金
型３内に押込んで反転させると一層強固に溶着接
合し、通孔閉塞が確実となるので好ましい。 In addition, in this reversal step, it is preferable to further heat the thin part of the tip to be reversely curled to a molten state, and then push it into the reversal mold 3 and reverse it, as this will make the welding bond even stronger and ensure that the through hole is closed. .
かくして、第４図に示す如く、多孔プラスチツ
ク管１の管端面に開口した通孔１３は、確実に閉
塞される。 Thus, as shown in FIG. 4, the through hole 13 opened at the end surface of the porous plastic tube 1 is reliably closed.
尚、第２図、及び第３図に示した実施例では、
多孔プラスチツク管１の内壁層１１を押潰して外
壁層１３に密着させ、この先端肉薄部を管の内側
に反転カールさせたものを示したが、本発明の通
孔閉塞法は必ずしもこれに限定されるものではな
く、これとは逆に、外壁層１２を押潰して内壁層
１１に密着させ、その先端肉薄部を管１の外側に
反転カールさせるようにしてもよい。また、この
通孔閉塞法は、直管の端部に適用できるだけでな
く、直管の端部を拡径して受口を設け、該受口の
端面に開口した通孔を閉塞する場合にも適用する
ことができる。 In addition, in the embodiment shown in FIGS. 2 and 3,
Although the inner wall layer 11 of the porous plastic tube 1 is crushed and brought into close contact with the outer wall layer 13, and the thin end portion is reversely curled inside the tube, the hole closing method of the present invention is not necessarily limited to this. Instead, on the contrary, the outer wall layer 12 may be crushed and brought into close contact with the inner wall layer 11, and the thin end portion thereof may be reversely curled to the outside of the tube 1. In addition, this hole closing method can be applied not only to the end of a straight pipe, but also when the diameter of the end of the straight pipe is expanded to provide a socket and the hole opened at the end of the socket is closed. can also be applied.
第５図は、この受口成形と同時に通孔を閉塞す
る場合に最も適した押潰工程の他の実施例を示す
ものであつて、この場合には多孔プラスチツク管
１の端部を加熱軟化させた後、該管端部に内型５
を圧入して受口を設ける。この時、受口の先端部
は内型５の段部５１に乗り上げられてこの内壁層
１１が押し潰されるので、その先端部に外型４を
当がい、内壁層１１と外壁層１２とを密着させ
る。 FIG. 5 shows another embodiment of the crushing process most suitable for closing the through hole at the same time as this socket forming. In this case, the end of the porous plastic tube 1 is heated and softened. After that, insert an inner mold 5 at the end of the tube.
Press in and create a socket. At this time, the tip of the socket rides on the step 51 of the inner mold 5 and the inner wall layer 11 is crushed, so the outer mold 4 is applied to the tip and the inner wall layer 11 and the outer wall layer 12 are separated. Bring it into close contact.
しかる後、前記実施例で説明した如く、第３図
の反転金型３内に押込み、その先端肉薄部を反転
カールさせることによつて通孔１３を確実に閉塞
する。 Thereafter, as explained in the previous embodiment, it is pushed into the reversible mold 3 shown in FIG. 3, and the thin end portion is reversely curled to reliably close the through hole 13.
（発明の効果）
以上詳述した如く、本発明の通孔閉塞法は、ま
ず、プラスチツク管の端部を加熱し、軟化、若し
くは溶融させた後、この管端部を押潰して内壁層
と外壁層とを密着させ、しかる後、この先端肉薄
部を管の内側、又は外側に反転カールさせるの
で、通孔閉塞は確実となり、たとえ振動、衝撃等
を受けた際にもこの閉塞部が剥離して開口する恐
れも全くない。(Effects of the Invention) As described above in detail, the through hole closing method of the present invention first heats the end of a plastic tube to soften or melt it, and then crushes the end of the tube to form an inner wall layer. The thin part at the tip is brought into close contact with the outer wall layer, and then the thin part at the tip is reversely curled to the inside or outside of the tube, ensuring that the hole is blocked, and even when subjected to vibrations, shocks, etc., this blocked part will not peel off. There is no fear of it opening.
第１図は多孔プラスチツク管の部分正面図、第
２図は本発明の押潰工程を示す要部半断面図、第
３図は反転カールの工程を示す要部半断面図、第
４図は本発明方法によつて得られた閉塞部の要部
半断面図、第５図は本発明の押潰工程の他の実施
例を示す要部半断面図である。
１……多孔プラスチツク管、１１……内壁層、
１２……外壁層、１３……通孔、２……押潰金
型、３……反転金型、４……外型、５……内型。
Figure 1 is a partial front view of a porous plastic tube, Figure 2 is a half-sectional view of the main part showing the crushing process of the present invention, Figure 3 is a half-sectional view of the main part showing the inversion curling process, and Figure 4 is a half-sectional view of the main part showing the inversion curling process. FIG. 5 is a half-sectional view of the main part of the closed part obtained by the method of the present invention, and FIG. 5 is a half-sectional view of the main part showing another embodiment of the crushing step of the present invention. 1... Porous plastic tube, 11... Inner wall layer,
12...Outer wall layer, 13...Through hole, 2...Crushing mold, 3...Inversion mold, 4...Outer mold, 5...Inner mold.
Claims (1)
チツク管の端部を加熱し、軟化、若しくは溶融し
た後、該管端部の内壁層、又は外壁層を押潰し、
しかる後、該押潰した肉薄部を管の内側、又は外
側に反転カールさせて管端面に開口した通孔を閉
塞したことを特徴とする多孔プラスチツク管の通
孔閉塞法。1. After heating the end of a plastic tube that has a large number of holes in the tube axis direction in the tube wall to soften or melt it, crush the inner wall layer or outer wall layer of the tube end,
A method for closing a hole in a porous plastic tube, characterized in that the crushed thin wall portion is then reversely curled to the inside or outside of the tube to close the hole opened in the end surface of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2478784A JPS60168627A (en) | 1984-02-13 | 1984-02-13 | Closing method of hole of porous plastic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2478784A JPS60168627A (en) | 1984-02-13 | 1984-02-13 | Closing method of hole of porous plastic tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60168627A JPS60168627A (en) | 1985-09-02 |
| JPH0365251B2 true JPH0365251B2 (en) | 1991-10-11 |
Family
ID=12147893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2478784A Granted JPS60168627A (en) | 1984-02-13 | 1984-02-13 | Closing method of hole of porous plastic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60168627A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61258726A (en) * | 1985-05-14 | 1986-11-17 | Sekisui Chem Co Ltd | Blockading of through-hole of resin tube provided with axial through-hole in tube wall in parallel |
| FR2689810B1 (en) * | 1992-04-10 | 1995-07-07 | Kaysersberg Packaging Sa | METHOD FOR CLOSING THE EDGES OF HONEYCOMB PLATES AND DEVICE FOR CARRYING OUT THE METHOD. |
-
1984
- 1984-02-13 JP JP2478784A patent/JPS60168627A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60168627A (en) | 1985-09-02 |
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